(gud-sentinel): Use force-mode-line-update.

diff --git a/lisp/gud.el b/lisp/gud.el
index 94daa42..859c0e0 100644 (file)
--- a/lisp/gud.el
+++ b/lisp/gud.el
@@ -1217,8 +1217,7 @@ comint mode, which see."
               (progn
                 ;; Write something in *compilation* and hack its mode line,
                 (set-buffer (process-buffer proc))
-                ;; Force mode line redisplay soon
-                (set-buffer-modified-p (buffer-modified-p))
+                (force-mode-line-update)
                 (if (eobp)
                     (insert ?\n mode-name " " msg)
                   (save-excursion